I want to make the block's a little bit transparent and bright
Change to cycles render
Select the object and make a new material for it
Open node editor and delete the diffuse material
Add a mix shader, emission node and a transparent BSDF and connect them like they are connected in the image
The strength on the emission node is the glow strength of the object
The Fac on the mix shader is the transparency of the object: 1.0 is invisible and 0.0 is not any transparent